Thread: Printing Patterns

I've tried many ways to do this, but can't seem to find out how to make patters such as these in a C program. I've tried most things I've learned about C so far, but still no cigar. Last time I came here I got outstanding help from you guys, so thanks very much for that! If any more information is needed then feel free to ask for it. I have the rest of the program but it is quite long now so I thought I'd simplify it a bit.

Here's the basics of my program:
1. User see's options of patterns.
2. User chooses an option.
3. User chooses a size (more details on this below).
4. The correct pattern & size is printed.
Size can be [ 2 - 9 ]

Here are what the functions should look like after printing.
Pattern One:
if size is 5:

1 * * * *
5 2 * * *
5 5 3 * *
5 5 5 4 *
5 5 5 5 5

if the size is 6:

1 * * * * *
6 2 * * * *
6 6 3 * * *
6 6 6 4 * *
6 6 6 6 5 *
6 6 6 6 6 6


Pattern Two:
(random numbers within the range 0 to size, inclusive)
if size is 5:
*********
* 0 4 3 *
* 1 2 5 *
* 3 0 1 *
*********
if size is 6:
***********
* 3 6 2 0 *
* 5 3 0 2 *
* 4 5 3 1 *
* 1 2 0 3 *
***********


Pattern Three:
The printed pattern does not include the - 's. I put those in because it is all aligned to the right, and this forum does not allow me to use spaces like that. However I just saw the Align Right button.... oh well you know what I was getting at.
if size is 5:
and the first number is 0:
--- 0 1 2 3 4
----- 5 6 7 8
------- 9 0 1
--------- 2 3
----------- 4


f size is 5:
--- 5 6 7 8 9
----- 0 1 2 3
------- 4 5 6
--------- 7 8
----------- 9
and the first number is 5:
The first number in the pattern is a random integer between 0 and 9 inclusive. All numbers in the pattern are integers within the same range. Notice that they are consecutive integers as you read the pattern one row at a time, left to right, and when you get to ten, the number changes back to 0.


Thanks for any help, this one has got me stumped.

>> I've tried many ways to do this, but can't seem to find out how to make patters such as these in a C program.

Rather than simply saying that you have tried and failed, post the actual code you are struggling with.

That is not what they want you to do. If I was marking it, you'd probably get a 1 out of 10 (for effort).

To control the width of a line, just print however many characters you want, then a "\n".

Originally Posted by zacs7

That is not what they want you to do. If I was marking it, you'd probably get a 1 out of 10 (for effort).

I'm aware of this, which is why I made the thread here. Please let me know if you have an idea of how to do it another way.

Originally Posted by zacs7

To control the width of a line, just print however many characters you want, then a "\n".

I thought Adak was talking about some way to set the max characters on a line, and if there was more characters than the set max then it would only show the characters up until the max.

Ex:
max = 10 //however it is actually set is beyond me
printf( "012345678910" );

output: 0123456789

I may have read his post wrong though.

Okay...

Code:

int   widthOfAnythingElse = 0,
      widthOfLine = 0,
      stars = 0;

/* I want a line width of 10 in total, with 3 stars */
stars = 3;
widthOfLine = 10;
widthOfAnythingElse = widthOfLine - stars;

for(i = 0; i < widthOfAnythingElse; i++)
{
   putchar(' ');
}

for(i = 0; i < stars; i++)
{
   putchar('*');
}

putchar('\n');

Of course there are many ways to do it

Take what you have above, and REPRESENT it through the use of a loop.

Code:

/* Printing some lines,  Adak
if (size == 6)
  {
      printf("1 * * * * *\n");
      printf("6 2 * * * *\n");     
      printf("6 6 3 * * *\n");     
      printf("6 6 6 4 * *\n");
      printf("6 6 6 6 5 *\n");
      printf("6 6 6 6 6 6\n");
  }
*/

#include <stdio.h>

int main(void)   {
   int i, j, k, size, totalsize, number, gar;
   totalsize = 6;

   printf("\n");

   //Outer for loop represents and controls the total number of sets to be printed
  
   for(k = 1; k <= totalsize; k++)  {

      size = k;
      printf("\n");

      //This for loop represents the total number of lines to be printed, in each
      //set size, and the width of that line, in char's.

      for(i = 1; i <= size; i++)  { 
     
         for(j = size-1; j > size - i; --j)  //controls printing set size number 
            printf("&#37;d ", size);
                                         
         printf("%d ", i);                   //prints the last digit of each line

         for(j = 1; j <= size - i; j++)     //controls the asterisks
            printf("* ");

         printf("\n");
      }
   }
   printf("\n\n                                 Press Enter to Quit ");
   gar = getchar(); gar++;
   return 0;
}